Gaya APA

Saputra, N. (2015). Improving The Students' Writing Proficiency Through Collaborative Writing Of SMPN 23 Makassar . Makassar: Fakultas Ekonomi UGM.

Gaya MLA

Saputra, Nahrul. "Improving The Students' Writing Proficiency Through Collaborative Writing Of SMPN 23 Makassar". Makassar: Fakultas Ekonomi UGM, 2015. Text.